body {
  margin: 0;
  background-color: #eee;
}

#book-stage {
  position: relative;
  width: 960px;
  height: 720px;
  background-color: white;
  margin: 0 auto;
  overflow: hidden;
}

#book-stage > #book {
  width: 100%;
  height: 100%;
  position: relative;
}

#book > .page {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}